Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already establish readOnlyHint=true, destructiveHint=false, and openWorldHint=true. The description adds only the HTTP endpoint GET /v3/time_entries/details, which is consistent but redundant; it does not disclose response shape, error behavior, permissions, or rate-limit context.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two very short fragments, front-loaded and free of filler. However, the terseness borders on under-specification, so it does not reach a 5.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a low-complexity single-record getter with full schema coverage and read-only annotations, this is nearly enough. It does not explain the returned object or error cases, and no output schema exists to cover that gap.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The sole parameter is fully described in the schema (100% coverage) as 'Time entry id (from desk365_list_time_entries).' The description adds no further meaning beyond 'by id', so the baseline of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names the resource (time entry) and the selector (by id), which distinguishes it from desk365_list_time_entries. It stops short of a full sentence such as 'Retrieves a single time entry,' but the intent is unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is only implied: 'by id' and the schema note that the id comes from desk365_list_time_entries suggest this should be used when an id is already known. There is no explicit when-to-use or when-not guidance and no alternative routing.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.